| enteric coccidia in free-ranging american bison (bison bison) in montana. | four eimeria species have been reported from american bison (bison bison): e. auburnensis, e. bovis, e. brasiliensis, and e. canadensis. we report on finding two additional species: e. ellipsoidalis and e. zuernii. in 1993, the prevalence of these six species in 31 yearling bison in a recently-established herd on private ranchland in montana (usa) was: e. bovis, 97%; e. canadensis, 90%; e. zuernii, 32%; e. ellipsoidalis, 32%; e. auburnensis, 9.7%; and e. brasiliensis, 3.2%. eimerian oocysts also ... | 1994 | 8028115 |
| isolation of pasteurella spp. from free-ranging american bison (bison bison). | from november 1991 through march 1992, nasal and pharyngeal swab samples were collected from 45 bison (bison bison) from yellowstone national park, montana (usa) and cultured for pasteurella spp. thirteen isolates of pasteurella spp. were recovered from 10 (22%) of the animals. ten isolates were from pharyngeal samples in contrast to three isolates from nasal samples. pasteurella haemolytica (six biotype t, two biotype a, and two biotype 3) was the predominant pasteurella species. five biotype t ... | 1996 | 8722271 |
| brucellosis in elk of eastern idaho. | brucellosis occurs in free-ranging elk (cervus elaphus) and bison (bison bison) in the greater yellowstone area, which includes portions of idaho, wyoming, and montana. brucella abortus was first detected in elk in idaho in 1998, and from 1998 to 2002, serologic surveillance of hunter-killed elk was conducted in northeastern and southeastern idaho. prevalence of antibodies in these elk varied annually, but averaged between 2% and 3%. elk were also trapped in northeastern idaho from 1998-2002 and ... | 2006 | 16870849 |
| temporal variability in winter travel patterns of yellowstone bison: the effects of road grooming. | the influence of winter recreation on wildlife in yellowstone national park (ynp), wyoming and montana, usa, is a controversial issue. in particular, the effects of road grooming, done to facilitate snowmobile and snowcoach travel, on bison (bison bison) ecology are under debate. we collected data during winters, from 1997 to 2005, on bison road use, off-road travel, and activity budgets to quantify temporal trends in the amount of bison road and off-road travel and to identify the ecological fa ... | 2006 | 16937817 |
| dances with anthrax: wolves (canis lupus) kill anthrax bacteremic plains bison (bison bison bison) in southwestern montana. | bacillus anthracis, the cause of anthrax, was recovered from two plains bison (bison bison bison) cows killed by wolves (canis lupus) in montana, usa, without associated wolf mortality in july 2010. this bison herd experienced an epizootic in summer 2008, killing ∼ 8% of the herd, the first documented in the region in several decades. no wolf deaths were associated with the 2008 event. surveillance has continued since 2008, with research, ranch, and wildlife personnel diligent during summer. as ... | 2014 | 24484485 |
| brucellosis transmission between wildlife and livestock in the greater yellowstone ecosystem: inferences from dna genotyping. | the wildlife of the greater yellowstone ecosystem carries brucellosis, which was first introduced to the area by cattle in the 19th century. brucellosis transmission between wildlife and livestock has been difficult to study due to challenges in culturing the causative agent, brucella abortus . we examined b. abortus transmission between american bison ( bison bison ), rocky mountain elk ( cervus elaphus nelsoni), and cattle ( bos taurus ) using variable number tandem repeat (vntr) markers on dn ... | 2017 | 28118557 |
| evaluation of bison (bison bison) semen from yellowstone national park, montana, usa, bulls for brucella abortus shedding. | to determine if bison (bison bison) bulls from yellowstone national park (ynp), montana, usa, shed an infective dose of brucella abortus in semen, 50 ynp bulls were captured on public lands in montana during the winter and early spring (april-may) of 2010 and 2011. the bulls were immobilized, and blood and semen samples were collected for serology and brucella culture. thirty-five bulls (70%) were antibody-positive, and b. abortus was cultured from semen in three (9%) of the 35 antibody-positive ... | 2013 | 23778628 |
| yersinia enterocolitica: an unlikely cause of positive brucellosis tests in greater yellowstone ecosystem bison (bison bison). | yersinia enterocolitica serotype o:9 has identical o-antigens to those of brucella abortus and has apparently caused false-positive reactions in numerous brucellosis serologic tests in elk (cervus canadensis) from southwest montana. we investigated whether a similar phenomenon was occurring in brucellosis antibody-positive bison (bison bison) using y. enterocolitica culturing techniques and multiplex pcr of four diagnostic loci. feces from 53 yellowstone bison culled from the population and 113 ... | 2012 | 22740518 |
| phenotypic effects of cattle mitochondrial dna in american bison. | hybridization between endangered species and more common species is a significant problem in conservation biology because it may result in extinction or loss of adaptation. the historical reduction in abundance and geographic distribution of the american plains bison (bison bison bison) and their recovery over the last 125 years is well documented. however, introgression from domestic cattle (bos taurus) into the few remaining bison populations that existed in the late 1800s has now been identif ... | 2012 | 22862781 |